pixman-general.c revision 953d7d37 
1/*
2 * Copyright © 2009 Red Hat, Inc.
3 * Copyright © 2000 SuSE, Inc.
4 * Copyright © 2007 Red Hat, Inc.
5 * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
6 *             2005 Lars Knoll & Zack Rusin, Trolltech
7 *             2008 Aaron Plattner, NVIDIA Corporation
8 *
9 * Permission to use, copy, modify, distribute, and sell this software and its
10 * documentation for any purpose is hereby granted without fee, provided that
11 * the above copyright notice appear in all copies and that both that
12 * copyright notice and this permission notice appear in supporting
13 * documentation, and that the name of Red Hat not be used in advertising or
14 * publicity pertaining to distribution of the software without specific,
15 * written prior permission.  Red Hat makes no representations about the
16 * suitability of this software for any purpose.  It is provided "as is"
17 * without express or implied warranty.
18 *
19 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
20 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
23 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
24 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
25 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
26 * SOFTWARE.
27 */
28#ifdef HAVE_CONFIG_H
29#include <config.h>
30#endif
31#include <stdlib.h>
32#include <string.h>
33#include <math.h>
34#include <limits.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include "pixman-private.h"
39#include "pixman-combine32.h"
40#include "pixman-private.h"
41
42static void
43general_src_iter_init (pixman_implementation_t *imp,
44		       pixman_iter_t *iter,
45		       pixman_image_t *image,
46		       int x, int y, int width, int height,
47		       uint8_t *buffer, iter_flags_t flags)
48{
49    iter->image = image;
50    iter->x = x;
51    iter->y = y;
52    iter->width = width;
53    iter->buffer = (uint32_t *)buffer;
54
55    if (image->type == SOLID)
56    {
57	_pixman_solid_fill_iter_init (
58	    image, iter, x, y, width, height, buffer, flags);
59    }
60    else if (image->type == LINEAR)
61    {
62	_pixman_linear_gradient_iter_init (
63	    image, iter, x, y, width, height, buffer, flags);
64    }
65    else if (image->type == RADIAL)
66    {
67	_pixman_radial_gradient_iter_init (
68	    image, iter, x, y, width, height, buffer, flags);
69    }
70    else if (image->type == CONICAL)
71    {
72	_pixman_conical_gradient_iter_init (
73	    image, iter, x, y, width, height, buffer, flags);
74    }
75    else if (image->type == BITS)
76    {
77	_pixman_bits_image_src_iter_init (
78	    image, iter, x, y, width, height, buffer, flags);
79    }
80    else
81    {
82	_pixman_log_error (FUNC, "Pixman bug: unknown image type\n");
83    }
84}
85
86static void
87general_dest_iter_init (pixman_implementation_t *imp,
88			pixman_iter_t *iter,
89			pixman_image_t *image,
90			int x, int y, int width, int height,
91			uint8_t *buffer, iter_flags_t flags)
92{
93    iter->image = image;
94    iter->x = x;
95    iter->y = y;
96    iter->width = width;
97    iter->buffer = (uint32_t *)buffer;
98
99    if (image->type == BITS)
100    {
101	_pixman_bits_image_dest_iter_init (
102	    image, iter, x, y, width, height, buffer, flags);
103    }
104    else
105    {
106	_pixman_log_error (FUNC, "Trying to write to a non-writable image");
107    }
108}
109
110typedef struct op_info_t op_info_t;
111struct op_info_t
112{
113    uint8_t src, dst;
114};
115
116#define ITER_IGNORE_BOTH						\
117    (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA)
118
119static const op_info_t op_flags[PIXMAN_N_OPERATORS] =
120{
121    /* Src                   Dst                   */
122    { ITER_IGNORE_BOTH,      ITER_IGNORE_BOTH      }, /* CLEAR */
123    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_BOTH      }, /* SRC */
124    { ITER_IGNORE_BOTH,      ITER_LOCALIZED_ALPHA  }, /* DST */
125    { 0,                     ITER_LOCALIZED_ALPHA  }, /* OVER */
126    { ITER_LOCALIZED_ALPHA,  0                     }, /* OVER_REVERSE */
127    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* IN */
128    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* IN_REVERSE */
129    { ITER_LOCALIZED_ALPHA,  ITER_IGNORE_RGB       }, /* OUT */
130    { ITER_IGNORE_RGB,       ITER_LOCALIZED_ALPHA  }, /* OUT_REVERSE */
131    { 0,                     0                     }, /* ATOP */
132    { 0,                     0                     }, /* ATOP_REVERSE */
133    { 0,                     0                     }, /* XOR */
134    { ITER_LOCALIZED_ALPHA,  ITER_LOCALIZED_ALPHA  }, /* ADD */
135    { 0,                     0                     }, /* SATURATE */
136};
137
138#define SCANLINE_BUFFER_LENGTH 8192
139
140static void
141general_composite_rect  (pixman_implementation_t *imp,
142                         pixman_op_t              op,
143                         pixman_image_t *         src,
144                         pixman_image_t *         mask,
145                         pixman_image_t *         dest,
146                         int32_t                  src_x,
147                         int32_t                  src_y,
148                         int32_t                  mask_x,
149                         int32_t                  mask_y,
150                         int32_t                  dest_x,
151                         int32_t                  dest_y,
152                         int32_t                  width,
153                         int32_t                  height)
154{
155    uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8];
156    uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer;
157    uint8_t *src_buffer, *mask_buffer, *dest_buffer;
158    pixman_iter_t src_iter, mask_iter, dest_iter;
159    pixman_combine_32_func_t compose;
160    pixman_bool_t component_alpha;
161    iter_flags_t narrow, src_flags;
162    int Bpp;
163    int i;
164
165    if ((src->common.flags & FAST_PATH_NARROW_FORMAT)		&&
166	(!mask || mask->common.flags & FAST_PATH_NARROW_FORMAT)	&&
167	(dest->common.flags & FAST_PATH_NARROW_FORMAT))
168    {
169	narrow = ITER_NARROW;
170	Bpp = 4;
171    }
172    else
173    {
174	narrow = 0;
175	Bpp = 8;
176    }
177
178    if (width * Bpp > SCANLINE_BUFFER_LENGTH)
179    {
180	scanline_buffer = pixman_malloc_abc (width, 3, Bpp);
181
182	if (!scanline_buffer)
183	    return;
184    }
185
186    src_buffer = scanline_buffer;
187    mask_buffer = src_buffer + width * Bpp;
188    dest_buffer = mask_buffer + width * Bpp;
189
190    /* src iter */
191    src_flags = narrow | op_flags[op].src;
192
193    _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src,
194					  src_x, src_y, width, height,
195					  src_buffer, src_flags);
196
197    /* mask iter */
198    if ((src_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) ==
199	(ITER_IGNORE_ALPHA | ITER_IGNORE_RGB))
200    {
201	/* If it doesn't matter what the source is, then it doesn't matter
202	 * what the mask is
203	 */
204	mask = NULL;
205    }
206
207    component_alpha =
208        mask                            &&
209        mask->common.type == BITS       &&
210        mask->common.component_alpha    &&
211        PIXMAN_FORMAT_RGB (mask->bits.format);
212
213    _pixman_implementation_src_iter_init (
214	imp->toplevel, &mask_iter, mask, mask_x, mask_y, width, height,
215	mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB));
216
217    /* dest iter */
218    _pixman_implementation_dest_iter_init (imp->toplevel, &dest_iter, dest,
219					   dest_x, dest_y, width, height,
220					   dest_buffer,
221					   narrow | op_flags[op].dst);
222
223    if (narrow)
224    {
225	if (component_alpha)
226	    compose = _pixman_implementation_combine_32_ca;
227	else
228	    compose = _pixman_implementation_combine_32;
229    }
230    else
231    {
232	if (component_alpha)
233	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64_ca;
234	else
235	    compose = (pixman_combine_32_func_t)_pixman_implementation_combine_64;
236    }
237
238    if (!compose)
239	return;
240
241    for (i = 0; i < height; ++i)
242    {
243	uint32_t *s, *m, *d;
244
245	m = mask_iter.get_scanline (&mask_iter, NULL);
246	s = src_iter.get_scanline (&src_iter, m);
247	d = dest_iter.get_scanline (&dest_iter, NULL);
248
249	compose (imp->toplevel, op, d, s, m, width);
250
251	dest_iter.write_back (&dest_iter);
252    }
253
254    if (scanline_buffer != (uint8_t *) stack_scanline_buffer)
255	free (scanline_buffer);
256}
257
258static const pixman_fast_path_t general_fast_path[] =
259{
260    { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any,	0, PIXMAN_any, 0, general_composite_rect },
261    { PIXMAN_OP_NONE }
262};
263
264static pixman_bool_t
265general_blt (pixman_implementation_t *imp,
266             uint32_t *               src_bits,
267             uint32_t *               dst_bits,
268             int                      src_stride,
269             int                      dst_stride,
270             int                      src_bpp,
271             int                      dst_bpp,
272             int                      src_x,
273             int                      src_y,
274             int                      dst_x,
275             int                      dst_y,
276             int                      width,
277             int                      height)
278{
279    /* We can't blit unless we have sse2 or mmx */
280
281    return FALSE;
282}
283
284static pixman_bool_t
285general_fill (pixman_implementation_t *imp,
286              uint32_t *               bits,
287              int                      stride,
288              int                      bpp,
289              int                      x,
290              int                      y,
291              int                      width,
292              int                      height,
293              uint32_t xor)
294{
295    return FALSE;
296}
297
298pixman_implementation_t *
299_pixman_implementation_create_general (void)
300{
301    pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path);
302
303    _pixman_setup_combiner_functions_32 (imp);
304    _pixman_setup_combiner_functions_64 (imp);
305
306    imp->blt = general_blt;
307    imp->fill = general_fill;
308    imp->src_iter_init = general_src_iter_init;
309    imp->dest_iter_init = general_dest_iter_init;
310
311    return imp;
312}
313
314